A nut having a sleeve portion on its under side, which can be crimped or clinched to hold the item in place when inserted in a hole.
NSN 5975-01-463-3173
NSN 5965-01-076-9799
NSN 5999-00-205-0918
NSN 2925-00-149-0760
NSN 5910-01-245-0720
NSN 6110-01-212-7106
NSN 6685-01-407-2830
NSN 6320-01-429-9871
NSN 5935-01-537-2435
NSN 5965-00-055-8013
NSN 5895-01-646-3943
NSN 6240-01-467-0751